The correct option is 5 years.
Explanation
The tenure of the President of India is governed by the provisions laid down in Part V of the Constitution of India.
Constitutional Provisions:
- Article 56 of the Constitution explicitly states that the President shall hold office for a term of five years from the date on which he enters upon his office.
- This term is subject to the following conditions:
- The President may resign by writing under his hand addressed to the Vice-President.
- The President may be removed from office by impeachment for the violation of the Constitution (Article 61).
- Additionally, the President continues to hold office even after the expiration of the five-year term until the successor enters upon the office.
Key Takeaway: The constitutional term of office for the President of India is fixed at five years.